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$398+ Cheap flights from Seattle (SEA) to Helsinki (HEL)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 2/6. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — HEL
Jan 1 — Jan 81
Thu 1/1
Thu 1/8
1 adult, Economy
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1. Tell us where you want to go

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Cheapflights Tip: The best prices from Seattle/Tacoma Intl to Helsinki-Vantaa are usually found in January or October, booked 73 days in advance, depart on a Monday or Sunday and return on a Wednesday

Cheap flight deals from Seattle to Helsinki

Cheapest flights from Seattle to Helsinki
Explore the most affordable flight options available from Seattle to Helsinki. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 2, 2025.

This Cheapflightsfares deal was found by Cheapflights users on 11/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/303:10 pmSEA - HEL
1 stop17h 40mLufthansa
Sun 12/76:55 amHEL - SEA
2 stops25h 33mLufthansa
Deal found 11/30$831
This KLM deal was found by Cheapflights users on 11/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/303:00 pmSEA - HEL
1 stop36h 10mKLM
Sun 12/76:20 pmHEL - SEA
1 stop27h 30mKLM
Deal found 11/30$855
This United Airlines deal was found by Cheapflights users on 11/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/303:37 pmSEA - HEL
2 stops23h 43mUnited Airlines
Sun 12/76:55 amHEL - SEA
3 stops27h 55mUnited Airlines
Deal found 11/30$872
This Mytrip deal was found by Cheapflights users on 11/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/305:45 amSEA - HEL
3 stops32h 00mMultiple Airlines
Sun 12/74:05 pmHEL - SEA
3 stops34h 55mMultiple Airlines
Deal found 11/30$1,253
This United Airlines deal was found by Cheapflights users on 12/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/291:35 pmSEA - HEL
2 stops40h 55mUnited Airlines
Mon 1/51:55 pmHEL - SEA
2 stops55h 37mUnited Airlines
Deal found 12/1$1,261
This oojo deal was found by Cheapflights users on 12/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/232:35 pmSEA - HEL
2 stops19h 10mIcelandair
Fri 12/267:10 amHEL - SEA
2 stops19h 50mIcelandair
Deal found 12/1$1,462
This Air France deal was found by Cheapflights users on 12/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/233:05 pmSEA - HEL
1 stop16h 20mAir France
Fri 12/265:20 pmHEL - SEA
1 stop28h 05mAir France
Deal found 12/1$1,634
This Kiwi.com deal was found by Cheapflights users on 12/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/292:35 pmSEA - HEL
1 stop12h 20mMultiple Airlines
Mon 1/58:05 amHEL - SEA
2 stops42h 55mMultiple Airlines
Deal found 12/1$1,672

Find flight deals from Seattle to Helsinki

Discover tips and strategies to find the most affordable flight options for your journey from Seattle (SEA) to Helsinki (HEL). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated December 2, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$462
(Ticket)

One-way from

$398
(Kiwi.com)

Popular in

July

Cheapest in

January

Average price

$709

Good round-trip deal

$571 or less

Good one-way deal

$351 or less
Provider with most accurate pricing for Seattle/Tacoma Intl-Helsinki-Vantaa flight deals.
Search Deals
Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-Helsinki-Vantaa flights.
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From Seattle/Tacoma Intl to Helsinki-Vantaa
Search Deals
One-way flight from Seattle/Tacoma Intl to Helsinki-Vantaa
Search Deals
Highest demand for flights based on searches. 20% potential increase in price ($215 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($28 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals
Price to beat on a round-trip flight from Seattle/Tacoma Intl to Helsinki-Vantaa.
Search Deals
Price to beat on a one-way flight from Seattle/Tacoma Intl to Helsinki-Vantaa.
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Cheapflights Fare Finder

 
Customize your flight search to find flights from Seattle to Helsinki that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated December 2, 2025.
Use the filters below to find and compare flights from Seattle to Helsinki that are best for you.

Fly from

Seattle

Fly to

Helsinki

Route

Depart

Return

Price

SeattleHelsinki

SEA - HEL

SEAHEL

Seattle/Tacoma Intl

Tue 1/20

2:35 pm-12:55 pm

1 stop12h 20m

Helsinki-Vantaa

Sat 1/31

1:55 pm-5:00 pm

1 stop13h 05m

$491

SeattleHelsinki

SEA - HEL

SEAHEL

Seattle/Tacoma Intl

Wed 1/21

7:10 am-8:20 pm

2 stops27h 10m

Helsinki-Vantaa

Sun 2/8

9:00 pm-10:24 pm

2 stops35h 24m

$515

SeattleHelsinki

SEA - HEL

SEAHEL

Seattle/Tacoma Intl

Mon 1/12

2:35 pm-12:55 pm

1 stop12h 20m

Helsinki-Vantaa

Tue 1/20

1:55 pm-5:00 pm

1 stop13h 05m

$518

SeattleHelsinki

SEA - HEL

SEAHEL

Seattle/Tacoma Intl

Sun 1/11

2:35 pm-12:55 pm

1 stop12h 20m

Helsinki-Vantaa

Tue 1/20

1:55 pm-5:00 pm

1 stop13h 05m

$518

SeattleHelsinki

SEA - HEL

SEAHEL

Seattle/Tacoma Intl

Tue 1/13

2:35 pm-12:30 am

3 stops23h 55m

Helsinki-Vantaa

Fri 1/23

11:05 am-5:00 pm

2 stops15h 55m

$529

SeattleHelsinki

SEA - HEL

SEAHEL

Seattle/Tacoma Intl

Thu 1/22

7:10 am-3:25 pm

2 stops22h 15m

Helsinki-Vantaa

Mon 2/9

6:15 am-6:58 pm

2 stops22h 43m

$537

SeattleHelsinki

SEA - HEL

SEAHEL

Seattle/Tacoma Intl

Fri 1/23

7:15 am-3:25 pm

2 stops22h 10m

Helsinki-Vantaa

Sun 2/8

6:15 am-6:58 pm

2 stops22h 43m

$537

SeattleHelsinki

SEA - HEL

SEAHEL

Seattle/Tacoma Intl

Sat 1/10

7:10 am-10:40 am

2 stops17h 30m

Helsinki-Vantaa

Fri 1/16

11:20 am-10:25 pm

2 stops21h 05m

$540

SeattleHelsinki

SEA - HEL

SEAHEL

Seattle/Tacoma Intl

Mon 1/12

7:10 am-10:40 am

2 stops17h 30m

Helsinki-Vantaa

Tue 1/20

9:00 pm-10:25 pm

2 stops35h 25m

$540

SeattleHelsinki

SEA - HEL

SEAHEL

Seattle/Tacoma Intl

Sat 1/10

7:10 am-10:40 am

2 stops17h 30m

Helsinki-Vantaa

Mon 1/19

9:00 pm-10:25 pm

2 stops35h 25m

$540

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/30

Showing 1-10 of 15 results
1
2

Compare providers for flights from Seattle to Helsinki

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Seattle to Helsinki in December.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy2 starsTrust Score*3 stars
CheapflightsfaresPrice Accuracy3 starsTrust Score*2 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Seattle-Helsinki flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Seattle-Helsinki flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Seattle-Helsinki flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Seattle-Helsinki flights, Cheapflights users trust eDreams the most. eDreams has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Seattle-Helsinki flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Seattle to Helsinki

Have a flexible travel schedule? Discover the best time to fly to Helsinki from Seattle with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Seattle to Helsinki

How far ahead should I book a flight from Seattle to Helsinki?

Use this chart to determine the optimal time to book a round-trip flight from Seattle to Helsinki. Price data was last updated on November 28, 2025.

The best time to book flights from Seattle to Helsinki is 73 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

What is the cheapest month to book a flight from Seattle to Helsinki?

Currently, October is the cheapest month in which you can book a flight from Seattle to Helsinki (average of $322). Flying from Seattle to Helsinki in June is currently the most expensive (average of $724). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from SEA to HEL?

Find hourly flight availability from Seattle to Helsinki. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated December 2, 2025.

It’s optimal to fly from Seattle to Helsinki in the morning. By choosing this option you can save up to 17% on the cost of your flight, compared to a flight in the afternoon.

How much does it cost to fly round-trip from Seattle to Helsinki?

Reviews of airlines servicing Helsinki

Get insights into the airlines that provide service to Helsinki. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Helsinki. Reviews last updated December 2, 2025.
Get a feel of what it's like to fly with Finnair, Scandinavian Airlines, and American Airlines from Seattle to Helsinki by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Finnair
7.6
Good
1,334 reviews

Food

6.7

Entertainment

6.9

Crew

8.1

Boarding

7.6

Overall

7.6

Comfort

7.4

Reviews

1 / 20
4.0
Okay

Anonymous,Sep 2025

WAW - HEL

My flight to Europe was cancelled and rebooked. Bags got lost by FinnAir. Flight back home from Europe was cancelled the very next day after we landed. Zero compensation for these back to back cancellations on the exact same trip. Kayak doesn’t help with flight cancellation before trips says to contact trip protection only for trip protection to say it’s up to kayak. Don’t fly FinnAir.
Finnair
7.6
Good
1,334 reviews
Finnair
7.6
Good
1,334 reviews

Food

6.7

Entertainment

6.9

Crew

8.1

Boarding

7.6

Overall

7.6

Comfort

7.4

Reviews

1 / 20
4.0
Okay

Anonymous,Sep 2025

WAW - HEL

My flight to Europe was cancelled and rebooked. Bags got lost by FinnAir. Flight back home from Europe was cancelled the very next day after we landed. Zero compensation for these back to back cancellations on the exact same trip. Kayak doesn’t help with flight cancellation before trips says to contact trip protection only for trip protection to say it’s up to kayak. Don’t fly FinnAir.
Scandinavian Airlines
7.4
Good
1,591 reviews
Finnair
7.6
Good
1,334 reviews

Food

6.7

Entertainment

6.9

Crew

8.1

Boarding

7.6

Overall

7.6

Comfort

7.4

Reviews

1 / 20
4.0
Okay

Anonymous,Sep 2025

WAW - HEL

My flight to Europe was cancelled and rebooked. Bags got lost by FinnAir. Flight back home from Europe was cancelled the very next day after we landed. Zero compensation for these back to back cancellations on the exact same trip. Kayak doesn’t help with flight cancellation before trips says to contact trip protection only for trip protection to say it’s up to kayak. Don’t fly FinnAir.
American Airlines
7.2
Good
11,042 reviews
Finnair
7.6
Good
1,334 reviews

Food

6.7

Entertainment

6.9

Crew

8.1

Boarding

7.6

Overall

7.6

Comfort

7.4

Reviews

1 / 20
4.0
Okay

Anonymous,Sep 2025

WAW - HEL

My flight to Europe was cancelled and rebooked. Bags got lost by FinnAir. Flight back home from Europe was cancelled the very next day after we landed. Zero compensation for these back to back cancellations on the exact same trip. Kayak doesn’t help with flight cancellation before trips says to contact trip protection only for trip protection to say it’s up to kayak. Don’t fly FinnAir.
Icelandair
7.0
Good
584 reviews
Finnair
7.6
Good
1,334 reviews

Food

6.7

Entertainment

6.9

Crew

8.1

Boarding

7.6

Overall

7.6

Comfort

7.4

Reviews

1 / 20
4.0
Okay

Anonymous,Sep 2025

WAW - HEL

My flight to Europe was cancelled and rebooked. Bags got lost by FinnAir. Flight back home from Europe was cancelled the very next day after we landed. Zero compensation for these back to back cancellations on the exact same trip. Kayak doesn’t help with flight cancellation before trips says to contact trip protection only for trip protection to say it’s up to kayak. Don’t fly FinnAir.
British Airways
6.7
Okay
7,549 reviews
Finnair
7.6
Good
1,334 reviews

Food

6.7

Entertainment

6.9

Crew

8.1

Boarding

7.6

Overall

7.6

Comfort

7.4

Reviews

1 / 20
4.0
Okay

Anonymous,Sep 2025

WAW - HEL

My flight to Europe was cancelled and rebooked. Bags got lost by FinnAir. Flight back home from Europe was cancelled the very next day after we landed. Zero compensation for these back to back cancellations on the exact same trip. Kayak doesn’t help with flight cancellation before trips says to contact trip protection only for trip protection to say it’s up to kayak. Don’t fly FinnAir.

Related info for your journey

Find useful and relevant information for your journey from Seattle to Helsinki. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How popular is this Seattle to Helsinki flight route?

    This flight path from Seattle/Tacoma Intl to Helsinki-Vantaa was viewed by 1 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

  • How long is the flight from Seattle to Helsinki?

    Airlines like Icelandair and Scandinavian Airlines fly from Seattle to Helsinki in about 12h 20m. The time it takes to get you to your destination can typically vary by up to 14h 50m. Airlines will cover a distance of 4764 mi. This flight may include one or multiple stops.

  • What are the cheapest airlines flying from Seattle to Helsinki round-trip?

    Cheapflights users have booked flights from Seattle to Helsinki round-trip from $322. Other airlines that can offer you cheap pricing are Icelandair, from $424, and Delta, from $526. Users have found that Scandinavian Airlines is 60% cheaper than the other options available to this destination.

  • What are the cheapest flights from Seattle to Helsinki?

    The cheapest flight price from Seattle to Helsinki is $351. On average you can expect to pay $575. The most popular route, (Seattle/Tacoma Intl - Helsinki-Vantaa), can usually be booked for $488.

  • Can I find deals for flights from Seattle to Helsinki that include hotel bookings?

    Yes. In addition to deals on Seattle to Helsinki flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Seattle to Helsinki?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Seattle to Helsinki.

  • Can I find deals for business class flights from Seattle to Helsinki?

    Yes. Cheapflights offers flight deals from Seattle to Helsinki by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Seattle to Helsinki?

    Currently, October is the cheapest month in which you can book a flight from Seattle to Helsinki (average of $322). Flying from Seattle to Helsinki in June is currently the most expensive (average of $724). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near Helsinki?

Book flights to Helsinki if you plan to visit one of these locations
Vantaa
Lahti

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Alternative routes for Seattle to Helsinki

See prices for flight routes from nearby airports that may be better suited for you.
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Top 8 airlines flying from Seattle to Helsinki

Discover the top 8 airlines that operate flights from Seattle to Helsinki. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated December 2, 2025.
AirlineCheapestAverageFlexibilityOn-time
Scandinavian AirlinesCheapest$322Average$546FlexibilityNo cancel feeOn-time77%
IcelandairCheapest$424Average$806FlexibilityNo cancel feeOn-time76%
DeltaCheapest$526Average$1,020FlexibilityNo cancel feeOn-timeN/A
KLMCheapest$536Average$910FlexibilityNo cancel feeOn-time75%
American AirlinesCheapest$601Average$1,093FlexibilityNo cancel feeOn-time71%
FinnairCheapest$662Average$979FlexibilityNo cancel feeOn-time76%
British AirwaysCheapest$725Average$989FlexibilityNo cancel feeOn-time70%
LufthansaCheapest$817Average$973FlexibilityNo cancel feeOn-time76%

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